Given all the possibilities, this one is a vet job. Reasons? 1. You need to know what this growth IS, and whether or not it means present or future dangers to your pet. Cancer is a likelihood, but even if it's just a benign growth... it could be a sign of another problem. 2. You have no means to control pain and only crude means to control bleeding. Meaning, your pet will be miserable and excessive bleeding will be met by an urgent need for a vet anyway.